The Orange Box

You can find a neat Easter egg hidden in Test Chamber 17. One malfuncitoning wall panel reveals a den with cameras and pictures of cubes. Right of the piston and near the floor of is a user-name and password. Once you have written that down go to www.aperturelabratoies.com. and type login. Enter the user-name and password. Type "Help" if you want to know all you can do.
Passwords that work:
chell - portal
cjohnson - tier3

Description: Turn on the cheat console in-game, and press the tilde (~) to bring it up. You can then type the codes in below for the desired effect:ai_disable - NPCs are turned offgive item_battery - Receive 15 battery pointsgive item_healthkit - Receive 25 health pointskill - Character eliminates himselfnpc_create - Create NPCs
Hit tilde "~" and type "npc_create npc_ [name]" to spawn an NPC. Here is a list of the names you can enter for [name]:

All cheats are done by the game's console. They must be enabled by the console option on shortcut, or enabled through the game options under the Advanced section of Controls. The Console is then accessed by pressing ~.
*** Most of these require sv_cheats to be set to 1.

change_portalgun_linkage_id #

Replace # with 0, 1, 2, or 3. This allows for separate sets of portals to be created